Are there any known syncrepl compatibility issues between different 2.4.x
versions? We have a master slapd running 2.4.9 and a consumer running
2.4.21 and are having a syncrepl problem and only some of the data is
being synced. The consumer slapd logs messsages of the form:

a) Always run the same versions everywhere

b) Both of those versions are out of date, and have known issues with
syncrepl.